Power reverse mechanism for locomotives



Nw. 12, 1929. 5 BROWN 1,735,727

POWER REVERSE MECHANISM FOR LOCOMOTIVES Filed March 28. 1928 2 Sheets-Sheet l INVENTOR ATTORNEY Nov; 12, 129. w. 5. BROWN 1,735,727 POWEk REVERSE MECHANISM FOR LOCOMOTIVES Filed March 28. 1928 2 Sheets-Sheet 2 O a 2 g v /d %6'/- x7 A9 INVENTOR Mum aBwwv ATTORNEY WITNES'.:

Patented Nov. 12, 1929 UNITED STATES WILLIAM SHERMAN BROWN, OF KNOXVILLE, TENNESSEE, ASSIGNOR OF ONE-FOURTH TO E, L. KEISTER AND ONE-FOURTH TO K. W. DENNIS, BOTH OF KNOXVILLE, TEN- NESSEE POWER REVERSE MECHANISM FOR LOCOMOTIVES Application filed March 28, 1928. Serial No. 265,510.

This invention relates to a reversing mechanism for locomotives, the general object of the invention being to provide a slidable member connected with the reversing gear and operated by a threaded shaft which is driven from a small steam motor, the valve of whlch is automatically operated by a sliding memher, with means for operating the valve by a hand lever so that the reversing gear is locked in adjusted position by the threaded shaft and the slidable member, and steam is automatically cut off from the motor as soon as the sliding member is moved to a posit on to properly set the reversing gear. Th1s 1nvention will prevent accidents to the creeping of the reversing gear which often occurs when compressed air is used to operate sa1d gear.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated 1n the accompanying drawings and specifically pointed out in the appended claim.

In describing my invention in detall, reference Will be had to the accompanying drawings wherein like characters denote hke or corresponding parts throughout the-several views, and in which Figure 1 is an elevation of the invention.

Figure 2 is a sectional view through the valve for controlling the flow of steam to the motor.

Figure 3 is a section on line 3-3 of Figure 1.

Figure 4 is a section on line 44 of Figure 1.

Figure 5 is a section on line 55 of Figure 1.

Figure 6 is a section on line 66 of Flgure 1.

Figure 7 is a section on line 77 of Fig ure 1.

In these views, the numeral 1 indicates a frame which forms a guideway for the block 2, said block having V-shaped notches 1n 1ts edges for engaging the ridged edges 3 of the guideway forming portions of the frame. This block is connected with the reversing gear of the locomotive through the yoke 4 and the lever 5. A spirally threaded shaft 6 is journaled in the frame and passes through a threaded opening in the block so that the rotation of the shaft will cause the-block to move.

A rotary motor 8 is bolted to one end of the frame and the shaft 9 of the rotor 10 is flexibly connected with the shaft 6 by the coupling 11. The motor is provided with a pair of oppositely arranged inlet ports 12 and an exhaust port 13. A Valve casing 14 is supported by a bracket 15 fastened to the frame and the ports 16 of said casing are connected by the pipes 17 with the inlet ports 12 of the motor. Each port 16 is arranged adjacent the end of the casing, as shown in Figure 2.

A pipe 18 is arranged to deliver steam into the central part of the casing and a piston valve 19 is arranged in the casing to control the ports thereof. The piston rod 20 is connected with a rod 21 slidably mounted in a support 22 on the frame 1 and is pivoted to an upright rod 23 which has its lower end connected by a link 24 with a dependin bracket 25 fastened to the block 2. The lin is pivotally connected with the rod and with the bracket. A hand lever 26 provided with the usual quadrant 27 is connected by a link 28 with the upper end of the rod 23.

. From the foregoing it will be seen that when the lever 26 is shifted in one direction by the engineer,,it will move the rods 23 and 21 to a position which will cause the valve 19 to uncover the steam pipe 18 and cover one of the'ports 16 so that steam will flow through the valve casing into the motor and operate the same in one direction. Thus the shaft 6 will be rotatedto move the block 2 from a central position to one of the dotted line positions in Figure 1, according to the direction of rotation of the motor. This will shift the reversing gear of the locomotive, as the movement of the block 2 will cause the yoke 4 to actuate the lever 5 which is connected with the reversing gear. As the block ismoved, its connection with the rod 23, through the link 24, will also cause said rod to move about its pivotal connection with the link 28 so that the valve 19 will be moved through its rod 20 and the rod 21 so that the steam supply Will be cut off from the motor by the valve just as the block reaches its limit of movement.

When the reversing gear is to be moved back to its normal position, theengineer shifts the lever 26 in an opposite direction so as to move the valve 19 to open osition, thus supplylnig steam to the motor, w ich will cause the sha 6 to rotate and move the block 2 back to its central position. As the block moves, it will, through the rod 23 and the connections before described, move the piston to its central position and thus close the steam supply to the motor.

As before stated, the use of the spiral shaft and the sliding block with the threaded hole 1 therein through which the shaft passes position that the advantages and novel eatures of i tively locks the parts in adjusted position so that there is no danger of accidents due to the reversing mechanism moving out of its ad- 'usting position and the movement of the lock automatically closes the valve which controls the steam supply to the motor. The

lever 26 acts as an indicator for indicating the position of the reversin mechanism. 7

It is thoughtfrom the oregoin descr1p my invention will be readily apparent.v

It is to be understood that I may make changes in the construction and in the combination and arrangement of the several parts, provided that such changes fall within the scope of the appended claim.

What I claim is:

In combination with the reverse mechanism of a locomotive, a supportforming a guldeway, a member slidably arranged in r the guideway and connected with the mechanism, a spirally threaded shaft rotatably arranged in the support and passing through a threaded hole in the member, a reversing'motor for rotating the shaft, a slide valve for,

controllin the flow of steam to the motor, a

rod, a sli ably arranged link for connecting the rod to the stem of the valve, a link pivotally connecting one end of the rod to the slidable member, a hand lever and a link pivotally connected at one end to the hand lever and at its other end to the rod sothat the rod can be moved from the hand lever to adjust the valve and the rod will also be moved by the sliding member to move the valve to closed position.

In testimony whereofI afiix my signature. WILLIAM SHERMAN: BROWN. 

